Centers & Labs

RIKEN Center for Emergent Matter Science

Quantum System Theory Research Team

Team Leader: Daniel Loss (Ph.D.)
Daniel  Loss(Ph.D.)

Quantum System Theory Research Team is working on the quantum theory of condensed matter with a focus on spin and phase coherent phenomena in semiconducting and magnetic nanostructures. In particular, the team investigates the fundamental principles of quantum information processing in the solid state with a focus on spin qubits, superconducting qubits, and Majorana fermions. This involves the study of decoherence in many-body systems and scalable quantum computing architectures based on surface codes and long-distance entanglement schemes. The group also studies nuclear spin phases and many-body effects in low-dimensional systems with spin orbit interaction, and quantum transport of magnetization.

Main Research Field

Mathematical and physical sciences

Related Research Fields

Engineering

Keywords

  • solid state physics
  • semiconducting nanostructures
  • quantum computing
  • topological quantum effects
  • spintronics

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. * D. Loss and D.P. DiVincenzo:
    "Quantum computation with quantum dots"
    Phys. Rev. A 57, 120 (1998)
  2. * M.N. Leuenberger and D. Loss:
    "Quantum computing in molecular magnets"
    Nature 410, 789 (2001)
  3. * B. Coish and D. Loss:
    "Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics"
    Phys. Rev. B 70, 195340 (2004)
  4. * P. Recher, E.V. Sukhorukov, and D. Loss:
    "Andreev-Tunneling, Coulomb Blockade, and Resonant Transport of Non-Local Spin-Entangled Electrons"
    Phys. Rev. B 63, 165314 (2001)
  5. * J. Klinovaja, P. Stano, A. Yazdani, and D. Loss:
    "Topological Superconductivity and Majorana Fermions in RKKY Systems"
    Phys. Rev. Lett. 111, 186805 (2013)
  6. S. Chesi, Y.-D. Wang, J. Yoneda, T. Otsuka, S. Tarucha, and D. Loss:
    "Single-spin manipulation in a double quantum dot in the field of a micromagnet"
    Phys. Rev. B 90, 235311 (2014)
  7. S. Chesi, L.-P. Yang, and D. Loss,
    "Dephasing due to nuclear spins in large-amplitude electric dipole spin resonance",
    Phys. Rev. Lett. 116, 066806 (2016)
  8. G. Yang, P. Stano, J. Klinovaja, D. Loss,
    "Majorana bound states in magnetic skyrmions",
    Phys. Rev. B 93, 224505 (2016)
  9. J.-H. Park, G. Yang, J. Klinovaja, P. Stano, D. Loss,
    "Fractional boundary charges in quantum dot arrays with density modulation",
    Phys. Rev. B 94 , 075416 (2016)
  10. G. Yang, Ch.-H. Hsu, P. Stano, J. Klinovaja, D. Loss,
    "Long-Distance Entanglement of Spin Qubits via Quantum Hall Edge States",
    Phys. Rev. B 93, 075301 (2016)

Lab Members

Principal Investigator

Daniel Loss
Team Leader

Core Members

Peter Stano
Senior Scientist
Chen-Hsuan Hsu
Postdoctoral Researcher
Pasquale Marra
Postdoctoral Researcher
Angel Gutierrez Rubio
Postdoctoral Researcher